JP3342984B2 - Heat storage type heat exchanger and its operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type heat exchanger used for an ICD (inert gas cycle direct) power generation facility and the like, and a method of operating the same.

[0002]

2. Description of the Related Art Generally, a very high-temperature heating gas (for example, when helium gas is heated in an
When heating the gas to be heated in K), a regenerative heat exchanger is often used.

FIG. 10 shows an example of a conventional heat storage type heat exchanger. In the figure, a burner 92 for generating a high-temperature heating gas is disposed at the upper end of a heat insulating container 90, and a space 94 is secured above the heat insulating container 90, and a heat storage body 96 made of brick or the like is stored below the space 94. . This heat insulation container 9
Below 0, a passage 98 for taking out the heating gas and introducing the gas to be heated is formed, and below this passage 98, an inlet 99 is provided. The entrance 9 of this passage 98
An unillustrated heated gas supply source is connected to 9 via a valve 100. The space 94 is provided on the side wall of the heat insulating container 90.
A discharge port 102 for sending the gas to be heated to the outside of the heat insulating container 90 is provided at a position facing the air outlet.
Is connected to a device (not shown) provided downstream through the device.

[0004] The operation of this regenerative heat exchanger is as follows.

(1) A high-temperature heating gas is generated by the burner 92,
The heating gas is transmitted downward through the space 94 to the heat storage body 96. The heating gas that has passed through the heat storage body 96 is sent out of the heat insulating container 90 after passing through the passage 98.
The supply of the high-temperature heating gas from the burner 92 to the heat storage body 96 is as follows.
The operation is continued for a predetermined time so that the heat storage body 96 is sufficiently heated.

(2) A gas to be heated such as argon gas is allowed to pass through the heat storage body 96 upward from the bottom of the heated heat storage body 96,
The heat energy stored in the heat storage body 96 is transmitted to the gas to be heated. The heated gas that has been heated to a high temperature after passing through the heat storage body 96 is led out of the system from the outlet 102.

However, in such a heat storage type heat exchanger,
Since the temperature of the heat storage body 96 decreases with time due to heat exchange with the heated gas, the temperature of the heated gas discharged from the outlet 102 cannot be maintained sufficiently high. In other words, there is an inconvenience that the heated gas discharged from the discharge port 102 cannot be maintained at a desired temperature and stabilized for a long time.

As means for solving such inconveniences,
Conventionally, the following method is known.

A) Two regenerative heat exchangers, namely the first
And the second heat storage type heat exchanger.
At the beginning of the heat exchange, a satisfactory temperature can be obtained only with the first regenerative heat exchanger, so that only the first regenerative heat exchanger is operated. After this operation, the temperature of the gas to be heated discharged from the first regenerative heat exchanger decreases with the passage of time, but after the elapse of a predetermined time, the second regenerative heat exchanger is activated and To compensate for the temperature drop of the heated gas discharged from the heat storage type heat exchanger. That is, in order to stabilize the temperature of the gas to be discharged, the operation timings of the first and second regenerative heat exchangers are relatively shifted. Thus, the temperature of the gas to be heated is stabilized by mixing the high-temperature gas and the low-temperature gas in the first and second regenerative heat exchangers (JP-A-61-285394).

B) In the heat exchanger shown in FIG. 10, a bypass passage is provided directly connecting the inlet 99 of the passage 98 and the outlet 102 so as to bypass a part of the gas to be heated without passing through the heat storage body 96. This bypass gas and the heat storage body 9
The gas to be heated after passing through 6 is mixed at the outlet 102 and the flow rate of the bypass gas is reduced with the passage of time to stabilize the temperature of the heated gas led out from the outlet 104.

[0011]

According to the above-mentioned means A),
At least two heat exchangers are required to stabilize the temperature of the gas to be heated, so that the equipment cannot be enlarged. On the other hand, in the means B), since a part of the gas to be heated is bypassed and not passed through the heat storage body 96, the bypass gas cannot receive the heat energy of the high-temperature heating gas. Therefore, the heat exchanger cannot be fully utilized, and the heat efficiency is poor. Further, since the bypass gas is not heated at all, its temperature remains extremely low. When such a low-temperature bypass gas is mixed with a gas heated to a high temperature, the temperature of the heated gas after mixing tends to fluctuate extremely even if the amount of the bypass gas mixed is small, and delicate temperature adjustment is not possible. Hard to do.

In view of such circumstances, the present invention provides a regenerative heat exchanger capable of stabilizing the temperature of a gas to be heated for a long time without increasing the number of heat exchangers, and a method of operating the same. The purpose is to do.

[0013]

Means for Solving the Problems As means for solving the above problems, the present invention provides a container formed of a heat insulating wall,
A first end, a second end opposite to the first end, provided in the insulated container for storing thermal energy, the first end and the second end; A plurality of temperature regions having different temperatures from each other are formed in the heat storage body by allowing the heat storage body through which the gas can pass and the heating gas to pass from the first end to the second end. Heating means for heating the heat storage element; and after the heating of the heat storage element, the first end is connected to the first end from the second end independently for each of the temperature regions.
Heating gas supply means for transmitting the gas to be heated to the end; and a mixing unit for mixing the gases to be heated that have passed through the respective temperature regions at a position adjacent to the first end. (Claim 1).

When the plurality of temperature regions include a high-temperature portion and a low-temperature portion (claim 2), the high-temperature portion is formed inside the heat storage body, and the low-temperature portion is formed outside the heat storage body. Is preferred (claim 3).

More specifically, the high-temperature portion and the low-temperature portion are formed by a plurality of heat storage blocks stacked in the gas permeation direction, and each heat storage block has a gas passage passing through the block in the gas permeation direction. What has it is suitable (claim 4).

In this case, it is more preferable that the heat storage block laminated in the high temperature section or the low temperature section is divided into at least one of a circumferential direction and a radial direction.
Further, it is more preferable that the lamination boundary position of the heat storage block in the high temperature part and the lamination boundary position of the heat storage block in the low temperature part are shifted in the gas transmission direction (claim 7).

Either the high-temperature section or the low-temperature section is formed by a plurality of heat storage blocks stacked in the gas permeation direction, and each heat storage block has a gas passage extending therethrough in the gas permeation direction. The other of the high-temperature portion and the low-temperature portion may be formed by filling a large number of pebble-type heat storage bodies.

The heated gas supply means includes a flow rate adjusting means for adjusting a flow rate of the heated gas to the high temperature section and the low temperature section, and a time lapse after the start of the supply of the heated gas to the heat storage body. And a control means for controlling the flow rate adjusting means so as to increase the flow rate of the gas to be heated to the high temperature portion, or detecting the temperature of the gas to be heated mixed in the mixing section. Temperature detecting means, a flow rate adjusting means for adjusting a flow rate of the gas to be heated to the high temperature part and the low temperature part, and a temperature of the heated gas to be heated based on the temperature detected by the temperature detecting means. Control means for respectively adjusting the flow rate of the gas to be heated to the high-temperature section and the low-temperature section in a direction to maintain the temperature at a predetermined temperature.
0) is preferred.

The present invention also relates to a method for operating a heat storage type heat exchanger having a heat storage body capable of forming a plurality of temperature regions having different temperatures from each other in a vessel, wherein the heat storage members are independently covered in the respective temperature regions. The gas to be heated is permeated, and the gas to be heated is mixed with each other after the permeation. After the supply of the gas to be heated to the heat storage body is started, the gas to be heated is heated to a higher temperature region in the temperature region as time passes. (Claim 11).

The present invention also relates to a method for operating a heat storage type heat exchanger having a heat storage body capable of forming a plurality of temperature regions having different temperatures from each other in a container. The gas to be heated is permeated, and the gases to be heated are mixed with each other after the permeation, the temperature of the mixed gas to be heated is detected, and the temperature of the gas to be heated in each temperature range is maintained so as to maintain this temperature at a predetermined temperature. It controls the permeation flow rate (claim 12).

[0021]

According to the regenerative heat exchanger of the present invention, a plurality of temperature regions having different temperatures are formed in the heat storage body in a direction orthogonal to the gas transmission direction due to the temperature distribution generated after heating by the heating gas. Are formed side by side. Therefore, the gas to be heated is allowed to pass through each temperature region independently of each other, and the gas to be heated to the high-temperature portion with the lapse of time after the start of the supply of the gas to be heated to the heat storage body. The flow rate is increased, or the temperature of the gas to be heated that has passed through and mixed with each temperature region is detected, and the temperature of the gas to be heated to each temperature region is maintained at a predetermined temperature. By controlling the flow rate of the heating gas, the temperature of the heated gas to be heated can be stably maintained at a desired temperature for a long time.

In general, since the outside of the heat storage body is close to the side wall of the heat insulating container and easily radiates heat, it is possible to form a high-temperature part inside the heat storage body and a low-temperature part outside the heat storage body ( Claim 3). In this heat exchanger, at the beginning of the heated gas introduction, by giving priority to the heated gas permeation to the outside,
Before the outer portion is cooled by the atmosphere outside the heat insulating container, the heat energy of the outer portion can be efficiently used.

In the heat exchanger according to the fourth aspect, the heat storage body is
It is formed by stacking a plurality of heat storage blocks having gas passages in the gas permeation direction. With this configuration, heat exchange between the heat storage body and the gas to be heated can be efficiently performed. In particular, in the heat exchanger according to claims 5 and 6, since the heat storage block is divided in the radial direction or the circumferential direction, the thermal expansion of the heat storage body can be absorbed in the gap between the blocks.
Thermal strength and heat resistance can be significantly increased. Further, in the heat exchanger according to the seventh aspect, since the block stacking boundary position in the high-temperature portion and the block stacking boundary position in the low-temperature portion are shifted in the gas transmission direction, the heat energy is changed from the high-temperature portion to the low-temperature portion. Can be suppressed. That is, the heat insulating effect between regions having different temperatures can be significantly improved.

In the heat exchanger according to the present invention, one of the high-temperature portion and the low-temperature portion is formed by filling a large number of pebble-type heat storage bodies. Heat exchange with the gas to be heated can be performed efficiently.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The heat storage type heat exchanger shown in FIG. 1 includes a heat insulating container 10 extending vertically, and a burner 12 for generating a high-temperature heating gas is disposed at an upper end thereof. In the heat insulating container 10, a heat storage body 16 for the central part and a heat storage body 18 for the outer peripheral part are accommodated below the mixing chamber (mixing part) 14 while leaving it above. The central heat storage body 16 and the outer peripheral heat storage body 18 are formed of bricks (heat storage blocks) stacked in the vertical direction (gas transmission direction) in FIG. 1, and the heating gas and the gas to be heated pass between the bricks. It is transparent. Further, the bricks of the heat storage body 16 for the central part and the heat storage body 18 for the outer peripheral part have gas passages 16a and 18a passing through each brick in the vertical direction of the heat insulating container 10.
Are provided, so that gas can permeate through the gas passages 16a and 18a.

As shown in FIG. 2, the central heat storage body 1
Reference numeral 6 denotes a disk shape, and a brick-type heat storage body 18 for an outer peripheral portion is laminated so as to surround the disk from the outside in a radial direction (a direction orthogonal to the gas permeation direction). The outer-area brick-type regenerator 18 is divided in the circumferential direction and the radial direction, and the lamination boundary 19 between the vertically adjacent outer-area thermal storage bodies 18 is different from that of the vertically-adjacent center-area brick-type regenerator 16. Boundary 17
Brick type regenerator 1 so that it is shifted vertically
6, 18 are laminated.

As shown in FIG. 2, the central heat storage body 1
Reference numeral 6 has a central core portion and a boundary portion formed concentrically. The boundary is formed of a predetermined number of bricks that are mutually divided in the circumferential direction. The outer peripheral heat storage element 18 has an annular shape, is placed around the central heat storage element 16, and is formed of a predetermined number of bricks divided in the circumferential direction and the radial direction.

Further, in this embodiment, the position of the stacking boundary 17 of the bricks in the central heat storage element 16 and the position of the stacking boundary 19 of the bricks in the outer peripheral heat storage element 18 are vertically shifted from each other. Have been.

In the present invention, these heat storage bodies 16 and 18 are used.
Any material can be used. However, as in this embodiment, the MHD
In the heat storage type heat exchanger used for the power generation equipment, the heat storage body 1
Since the heating temperature of the upper portions A of 6, 18 becomes extremely high, it is preferable to use zirconia bricks and the like for this A portion and alumina bricks and the like for the B portion therebelow.

A first passage 20 and a second passage 22 are provided at the bottom of the heat insulating container 10. The first passage 20 has a circular cross section, and is connected to the bottom of the central heat storage body 16 so that the gas to be heated is introduced only into the central heat storage body 16. The second passage has an annular cross section, and is connected to the bottom of the outer peripheral heat storage body 18 so that the heated gas is introduced only into the outer peripheral heat storage body 18. That is, the first
The passage 20 and the second passage 22 are the same as the first passage 2
They are mutually independent around 0. This first passage 20
A supply source of a gas to be heated (not shown) is connected to an inlet 24 provided at a lower portion of the heater via a flow control valve (flow control means) 26, and the supply source of the gas to be heated is a flow control valve ( It is connected to an inlet 28 below the second passage 22 via a flow rate adjusting means 30.

In the heat insulating container 10, the mixing chamber 1
At a position adjacent to 4, a discharge port 32 for discharging the heated gas discharged from the heat insulating container 10 is formed. The discharge port 32 is connected to a downstream device via a valve 34. I have.

The heat storage heat exchanger is provided with a control device (flow control means) 35. This control device 35
Is connected to the flow control valves 26 and 30 and the first passage 2
The flow rates of the gas in the zero and second passages 22 are independently adjusted.

Next, the operation of the heat storage type heat exchanger will be described.

First, the valves 26, 30, and 34 are closed, and the burner 12 is operated to generate high-temperature heating gas, which is supplied to the heat storage bodies 16 and 18 from the upper end (first end) to the lower end (first end). 2 end). The heating gas that has passed through the heat storage bodies 16 and 18 is discharged to the outside of the heat insulating container 10 through a discharge port (not shown).
When passing through each of the gas passages 16a and 18a,
The heat energy of the heated gas is transmitted to the heat storage bodies 16 and 18. Here, the outer peripheral heat storage body 18 is adjacent to the side wall of the heat insulating container 10 and easily exchanges heat with the atmosphere outside the heat exchanger (ie, is easily cooled) as compared with the central heat exchanger. The temperature of the outer peripheral heat storage body 18 is usually lower than the temperature of the central heat storage body 16.

After the completion of the heating, the controller 35 opens the flow control valves 26 and 30 with the valve 34 opened. Thereafter, the heated gas is individually supplied to the central heat storage body 16 and the outer peripheral heat storage body 18 through the first and second passages 20 and 22, and the heated gas is supplied to the heat storage bodies 16 and 18. After passing from the lower end to the upper end, they are mixed in the mixing chamber 14 and discharged from the discharge port 32.

At this time, the control device 35 controls the valves 26 and 30 as shown in FIG. That is, while keeping the total supply flow rate of the heated gas constant, the ratio of the supply flow rate of the heated gas to the central heat storage body 16 which is a high temperature part gradually increases with time, and conversely, the low temperature part. Flow rate control is performed such that the ratio of the supply flow rate of the heated gas to the outer peripheral heat storage body 18 is gradually reduced.

The control contents are illustrated in a graph of FIG.
In this example, early in the heat exchange (ie, at 0 minutes),
60% of the gas to be heated is supplied to the outer peripheral heat storage element 18 and the remaining 40% is supplied to the central heat storage element 16. Next, the amount of the heated gas supplied to the outer peripheral heat storage body 18 is gradually reduced. When ten minutes have elapsed from the start of heating, the supply of the heated gas to the outer peripheral heat storage body 18 is stopped, and almost all of the heated gas is supplied only to the central heat storage body 16.

According to such control, during the initial stage of the supply of the heated gas, that is, during the period when the outer peripheral heat storage body 18 is at a sufficiently high temperature, a large amount of the heated gas is transferred to the outer peripheral heat storage body 18. The heat energy of the outer peripheral heat storage body 18 can be used effectively. Then, as the time elapses, the flow rate of the gas to be heated passing through the outer peripheral heat storage body 18 whose temperature tends to decrease gradually decreases, and instead, the gas flow rate to the central heat storage body 16 which still maintains a high temperature is maintained. By increasing the temperature, the temperature drop in the outer peripheral heat storage body 18 can be compensated, and as a result, the temperature of the heated gas discharged from the initial stage of supply of the heated gas can be stabilized at a relatively high temperature for a long time. Can be maintained.

In particular, in this embodiment, the central heat storage element 1
6 and the position of the lamination boundary 19 on the outer peripheral heat storage body 18 are vertically shifted, so that the gas to be heated is transferred from the central heat storage body 16 to the outer peripheral heat storage body 18 or On the other hand, since the movement is suppressed, the heat insulation between the heat storage bodies 16 and 18 is high, and the above effect can be more remarkably obtained.

In this embodiment, the heat storage element 1 for the central portion is used.
Since the heat storage body 6 and the outer circumference heat storage body 18 are divided in the circumferential direction and the radial direction, the thermal expansion of the heat storage bodies 16 and 18 can be absorbed by the gaps formed between the respective divided blocks. Heat resistance can be increased.

FIG. 3A shows a change over time of the temperature of the gas to be heated (argon gas) in the heat storage type heat exchanger in this embodiment, and FIG. 3B shows a conventional temperature change as shown in FIG. It is a diagram showing a time change of a temperature of a gas to be heated (argon gas) in a heat storage type heat exchanger. As shown in FIG. 3B, in the conventional heat storage type heat exchanger, a very high temperature gas to be heated can be generated at the beginning of heat exchange.
As time elapses, the temperature of the gas to be heated decreases substantially linearly, and reaches a considerably low temperature at the final point. In contrast,
As shown in FIG. 2A, according to the heat storage type heat exchanger of the present embodiment, the temperature of the gas to be heated discharged during the heat exchange is stabilized at a relatively high temperature for a long time. Can be maintained.

Next, a second embodiment will be described with reference to FIG. In this embodiment, a flow control means 36 is provided in place of the control device 35 in the first embodiment. The flow control means 36 detects the temperature of the gas to be heated discharged from the discharge port 32, and based on the detected temperature, the valve 26,
The flow rate of the gas to be heated in the first and second passages 20 and 22 is controlled by the flow rate control valves 26 and 30, respectively. The temperature of the gas to be heated discharged from 32 is maintained at a target constant value. Accordingly, when the temperature of the discharged heated gas decreases, the amount of the heated gas supplied from the flow control valve 26 to the central heat storage unit 16 is increased.
By such control, similarly to the first embodiment, the temperature of the heated gas to be discharged can be stably maintained in a relatively high temperature range for a long time.

The present invention is not limited to the embodiments described above, and the following embodiments and embodiments can be taken as examples.

(1) In each of the above embodiments, the automatic control system including the control device 35 and the flow rate control means 36 has been described.
In the present invention, the permeation of the gas to be heated to the heat storage bodies 16 and 18 may be manually controlled.

(2) FIG. 2 shows the case where the heat storage bodies 16 and 18 are formed of a predetermined number of blocks divided in the radial direction and the circumferential direction, but thermal expansion is not particularly taken into consideration. Alternatively, the heat storage bodies 16 and 18 may be formed of blocks divided in either the radial direction or the circumferential direction. Further, the structure of the heat storage body itself is not limited to the above-described embodiment. For example, as shown in FIG. 6A, an element 40 such as a regular hexagon is combined, and this is divided in the radial direction to form a central brick. The mold regenerator 42 and the outer peripheral brick regenerator 44 may be formed, or the center brick regenerator 16 and the outer peripheral brick regenerator 18 as shown in FIG. May be rectangular.

(3) In the first and second embodiments,
The central portion is a high temperature portion and the outer peripheral portion is a low temperature portion. However, when the heat insulating container has a hollow shape (a donut shape in cross section), that is, a cross sectional shape without a central portion, the inner peripheral wall of the heat insulating container is formed. The outermost part adjacent to the innermost part and the outermost part adjacent to the outer peripheral wall are the low temperature part, and the part sandwiched between the innermost part and the outermost part is the high temperature part. Also in this case, the low-temperature portion and the high-temperature portion having different temperatures are formed side by side in a direction orthogonal to the gas permeation direction, and by independently controlling the gas permeation flow rates in the high-temperature portion and the low-temperature portion. The same effects as those of the above embodiments can be obtained.

(4) In the first and second embodiments,
Although the heat storage element for the center part and the heat storage element for the outer peripheral part are both formed by brick blocks having gas passages, as shown in FIG.
A large number of pebble-type heat accumulators (pebble-like solids having an irregular outer shape) 46 may be formed by filling them. Alternatively, as shown in FIG. The mold heat storage 46 may be used. In this case, heat exchange between the heat storage element and the gas can be efficiently performed in the gap between the pebble-type heat storage elements 46.

(5) In the above embodiment, the heat storage element is divided into two parts, a high temperature part and a low temperature part. However, in the present invention, the heat storage element may be divided into three or more parts. Good.
Also in this case, the same effect as described above can be obtained by providing the supply passages for the gas to be heated which are independent of each other.

(6) According to the present invention, a stable gas to be heated can be obtained even with a single heat exchanger.
A plurality of heat exchangers may be used in combination as disclosed in Japanese Patent No. 85394 and the like.

(7) In the above embodiment, the hot gas is allowed to permeate downward through the burner provided at the upper end of the heat insulating container, so that the high temperature portion is formed at the center and the low temperature portion is formed at the outer periphery. However, as shown in FIG. 9 as a fifth embodiment, a high-temperature portion may be formed at the outer peripheral portion of the heat storage body and a low-temperature portion may be formed at the center portion. In the heat storage type heat exchanger of FIG. 1, a heated gas supply line and a heated gas discharge line are provided at the bottom of the heat insulating container 10. The heated gas supply line includes a total inflow control valve 26 ′ that controls the total inflow of the heated gas supplied to the heat insulating container 10, a flow of the heated gas into the passage 20, and the heating of the passage 22. A tributary flow control valve 30 'for adjusting the ratio of the gas flow to the gas flow is provided. The heating gas discharge line includes a total discharge control valve 37 for controlling the total discharge of the heating gas discharged from the heat insulating container 10, a discharge amount of the heating gas discharged from the passage 20, and a heating gas discharged from the passage 22. And a tributary outflow amount control valve 38 for adjusting the ratio to the discharge amount. The control valves 26 ', 30
, 37 and 38 are controlled by the controller 35, and among them, the heated gas control valves 26 'and 30' are controlled in the same manner as in the system shown in FIG. On the other hand, the heating gas control valve 3
The flow rates of the heating gases 7 and 38 are controlled so that the amount of the heating gas discharged from the passage 22 is larger than that of the heating gas discharged from the passage 20. By such heating gas flow control,
The outer peripheral heat storage 18 is heated to a higher temperature than the central thermal storage 16, and as a result, the high temperature part is formed in the outer peripheral part and the low temperature part is formed in the central part.

(8) In the above embodiment, the high temperature part and the low temperature part are arranged coaxially. However, it is also possible to arrange these high temperature part and low temperature part in a horizontal direction. For example, the high temperature part may be provided in the right half of the heat storage body, and the low temperature part may be provided in the left half.

[0052]

As described above, according to the present invention, the following effects can be obtained.

In the heat exchanger according to the first aspect, the heat storage body is divided into a plurality of temperature regions (a high temperature part and a low temperature part in claim 2) based on a temperature distribution after the heating gas has passed through the heat storage body. The gas to be heated is individually supplied to the region, and the gas after passing through each region is mixed in the mixing section. The flow rate of the supply of the heated gas to the high-temperature portion is increased with the passage of time, or the temperature of the heated gas after mixing is detected and the detected temperature is set to a predetermined temperature. By controlling the flow rate of the gas to be heated to each area so as to maintain the temperature, the temperature of the gas to be heated is stably maintained at a desired high temperature for a long time without increasing the number of heat exchangers. There is an effect that can be.

More specifically, in the heat exchanger according to the third aspect, the high temperature portion is provided at the center portion, and the outer peripheral portion in contact with the inner wall of the heat insulating container is the low temperature portion, and the central portion distant from the inner wall of the heat insulating container is the central portion. The use of the high-temperature portion has an effect that the heat energy stored in the heat storage body can be efficiently used.

Here, when the heat storage element is formed by laminating the heat storage blocks as described in claim 4, the heat storage element is divided into a plurality of blocks in a radial direction or a circumferential direction as described in claims 5 and 6. By doing so, the thermal expansion of the heat storage body can be absorbed in the gaps between these blocks, and there is an effect that the thermal strength and heat resistance of the heat storage body can be increased. Further, by shifting the block stacking boundary position in the high temperature section and the block stacking boundary position in the low temperature section in the gas permeation direction, the thermal energy moves from the high temperature section to the low temperature section. And the heat insulation between the high temperature part and the low temperature part can be enhanced.

On the other hand, in the heat exchanger according to the eighth aspect, one of the high-temperature portion and the low-temperature portion is formed by filling a large number of pebble-type heat accumulators. There is an effect that heat exchange between the heat storage body and the gas can be efficiently performed in the gap.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a heat storage type heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a heat storage body formed of bricks stacked in the heat storage type heat exchanger.

FIG. 3 (a) is a graph showing a time change of a heated gas discharge temperature in the heat storage type heat exchanger, and FIG. 3 (b) is a graph showing a time change of a heated gas discharge temperature in a conventional heat storage type heat exchanger. It is.

FIG. 4 is a graph showing the content of flow control performed in the heat storage type heat exchanger.

FIG. 5 is an overall configuration diagram of a heat storage type heat exchanger according to a second embodiment of the present invention.

FIGS. 6A and 6B are plan views showing modified examples of the heat storage body.

FIG. 7 is an overall configuration diagram of a heat storage type heat exchanger according to a third embodiment of the present invention.

FIG. 8 is an overall configuration diagram of a heat storage type heat exchanger according to a fourth embodiment of the present invention.

FIG. 9 is an overall configuration diagram of a heat storage type heat exchanger according to a fifth embodiment of the present invention.

FIG. 10 is an overall configuration diagram showing an example of a conventional heat storage type heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Insulated container 12 Burner 14 Mixing chamber 16 Heat storage material for central part 17, 19 Stacking boundary 18 Heat storage material for outer peripheral part 20 First passage 22 Second passage 26, 30 Flow control valve (flow control means) 35 Control device (flow control) Means) 36 Flow control means 46 Pebble type heat storage

Continuation of front page (72) Inventor Linshi. Marksbury United States Minnesota, Primus, Kings View Lane 509 (72) Inventor Toshikazu Yamamura 2-3-1, Shinhama, Araimachi, Takasago-shi, Hyogo Kobe Steel, Ltd. Inside Takasago Works (72) Inventor Shuhei Naya Takasago-shi, Hyogo Prefecture 2-3-1, Shinhama, Araimachi Kobe Steel, Ltd. Takasago Works (72) Inventor Toshio Kurosaka 1-5-5, Takatsukadai, Nishi-ku, Kobe Kobe Steel, Ltd.Kobe Research Institute (58) Field surveyed (Int.Cl. ⁷ , DB name) F28D 17/02 F28D 20/00

Claims (12)

(57) [Claims] 1. A container formed of a heat insulating wall, a first end provided in the heat insulating container for storing thermal energy, and a second end opposite to the first end. A heat storage body having a gas permeable between the first end and the second end, and a heat gas being transmitted from the first end to the second end by allowing the heating gas to pass through the heat storage body. Heating means for heating the heat accumulator such that a plurality of temperature regions having different temperatures from each other are formed; and, after heating the heat accumulator, independently from the second end from the second end for each of the temperature regions. Heating gas supply means for transmitting the gas to be heated to one end; and a mixing unit for mixing the gases to be heated that have passed through each temperature region at a position adjacent to the first end. Heat storage type heat exchanger. 2. The heat storage type heat exchanger according to claim 1, wherein said plurality of temperature regions include a high temperature part and a low temperature part. 3. The heat storage type heat exchanger according to claim 2, wherein the high temperature part is formed inside the heat storage body, and the low temperature part is formed outside the heat storage body. Heat storage type heat exchanger. 4. The heat storage type heat exchanger according to claim 2, wherein the high-temperature portion and the low-temperature portion are formed by a plurality of heat storage blocks stacked in a gas permeation direction, and each heat storage block is composed of the blocks. Characterized by having a gas passage penetrating in the gas permeation direction. 5. The heat storage type heat exchanger according to claim 4, wherein the heat storage block laminated on the high temperature portion has a circumferential direction,
A heat storage type heat exchanger divided into at least one in a radial direction. 6. The heat storage type heat exchanger according to claim 4, wherein the heat storage block laminated on the low-temperature portion is divided into at least one of a circumferential direction and a radial direction. Heat exchanger. 7. The heat storage type heat exchanger according to claim 4, wherein a lamination boundary position of the heat storage block in the high temperature part and a lamination boundary position of the heat storage block in the low temperature part are determined. A heat storage type heat exchanger characterized by being shifted in a gas permeation direction. 8. The heat storage type heat exchanger according to claim 2, wherein one of the high-temperature portion and the low-temperature portion is formed by a plurality of heat storage blocks stacked in a gas permeation direction. The heat block has a gas passage penetrating the block in the gas permeation direction, and the other of the high-temperature portion and the low-temperature portion is formed by filling a large number of pebble-type heat storage bodies. Type heat exchanger. 9. The heat storage type heat exchanger according to claim 1, wherein the heated gas supply means adjusts a flow rate of the heated gas to the high temperature section and the low temperature section. Means, and control means for controlling the flow rate adjusting means so as to increase the flow rate of the gas to be heated to the high-temperature portion with the lapse of time after the supply of the gas to be heated to the heat storage unit is started. Heat storage type heat exchanger. 10. The heat storage type heat exchanger according to claim 1, wherein said heated gas supply means includes a temperature detecting means for detecting a temperature of the heated gas mixed in said mixing section. Flow rate adjusting means for adjusting the flow rate of the heated gas to the high temperature section and the low temperature section; and a direction for maintaining the temperature of the heated gas at a predetermined temperature after heating based on the temperature detected by the temperature detecting means. And a control means for adjusting the flow rate of the gas to be heated to the high-temperature section and the low-temperature section, respectively. 11. A method for operating a heat storage type heat exchanger having a heat storage body capable of forming a plurality of temperature regions having different temperatures from each other in a container, wherein the gas to be heated is independently supplied to each of the temperature regions. Permeate, while mixing the heated gas after permeation, after the start of supplying the heated gas to the heat storage body,
A method for operating a regenerative heat exchanger, comprising increasing a flow rate of a gas to be heated to an area having a higher temperature in the temperature area over time. 12. A method for operating a heat storage type heat exchanger having a heat storage body capable of forming a plurality of temperature regions having different temperatures from each other in a container, wherein the gas to be heated is independently supplied to each of the temperature regions. The gas to be heated is mixed with the gas to be heated after transmission, and the temperature of the mixed gas to be heated is detected, and the permeation flow rate of the gas to be heated in each temperature region is maintained so as to maintain this temperature at a predetermined temperature. A method for operating a regenerative heat exchanger characterized by controlling.